Pump



Patented Dec. .18, i223.

WILLIAM M. THOMPSON, OF MEADVLLE, PENNSYLVANIA.

EUMP.

application mee July e,

TonZZ whom t may concern: y K

Be it known that 1, WILLIAM M. THOMP- sor, residing at Meadville, county of Crawford, State et' Pennsylvania, a citizen of the United States, have invented certain new and useful Improvements in Pumps, of which the following is a specication.

This invention relates to pumps and particularly to that type ot pump where air or gas pressure is applied to the interior of a closed vessel and the liquid therein forced out through a tube.

The principal object of my invention is the provision ot' an improved pump which produces an air or gas pressure within a vessel thereby forcing the liquid therefrom' and having means under control of the operator to immediately, at will, reduce the pressure in the vessel to atmospheric pressiiire, thereby causing the liquid to stop flowincr.

tn'other object of my invention ig the provision er a bulb pump for usein connection with a vessel stopper and outlet tube, there being provided an inlet valve for the bulb and an outlet valve therefrom t0 the interior of the vessel, lthe valves being substantially in line and s arranged that they may beth beV lifted byI way of pressing upward' upon the stem of one.

Referring particularlyv to the drawing wl'iere an embodiment of my invention is illustrated,

The ligure illustrates a' cross section of a carboy or other container having my improved pump installed therein.

designates a large carboy or other con! tainer such as might be used for acid, oil or other liquid. 11 designates a plugwhich is' preferably tapered to lit the container tightly and is made of any suitable material such as rubber. The plug 11 l makes a tight lit with the vessel 10 and is preferably provided with a lange 12 which may be held by a screw threaded collar 13, upon the lower face or the screw threaded body member 111. The main body 14 isprovided with an opening 15, having a 11p 16. A tube 17 is provided and has a portion extending through the plug 11 to a level below the level ot the liquid. At the outer end is a spout 1S for discharging the liquid as into another vessel 1 9.

The plug 11 is provided with an opening 20 in line with the opening 21 in `the main body 14. The passage 21 is separated trein 1921. semi No. esmas.

the passage 22 by the check valve 24:. This' valve is provided with a valve stem which is guided in the openingl 25 in the combined lap and guide 26. Vhen the pressure in the passage 22 is greater .than that the passage 21, the valve 23v will rise letting the pressure equalize. TWhen the pressure in the passage 22 is less than that in the passage 21, the valve 23 will close.

An inlet valve 27 is provided and ispreferab'l'y placed so that it is in line with the exhaust valve 23. The ste-m 23 ofthe inlet valve 27 is provided with ribs 29 which guide the valve 27 properly to its seat and yet permits the air tof pass into the passage 22 when the valve is raised. Then the pressure in the passage 22 is less thanl atmosphere the valve 27 will open admitting air to the passage 22. When the pressure in the passage 22 approaches atmospheric pressure, the valve 23 will againl be closed. At the end of the passage 22 is a pumping means suchv as ay hand operated rubber bulb 30. Y

rIfhe operationA of invention is as ollows: Y

When the plug 1l1 is fitted into the'carboy or .other container andl it is desired tov force the liquidy thereirgm, the bulb 30 is squeezed with the hand; The air within the bulb 30 is forced through the passage 22. The pressure, caused thereby, holds the valve 27 closed and forces the valve 23 open. The air under pressure passes into the passage 21 and thence through the passage 2O into the container 10. Upon release oit the bulb 30, the valve 23 closes, due to gravity and the decrease'in pressure in the passage 22 caused by expansion oi the bulb. pressure in the passage 22 decreases below atmospheric pressure, the atmospheric pressure from below raises the valve 27 and the passage 22 and bulb 30 are lilled with air.

The bulb 30 is repeatedly pressed and released unt-il the pressure within the carboy or container 10 causes the liquid to pass up the tube 17 and out ot the spout 18. When enough liquid has been removed, from the carboy or container 10, the lower end 31 of the valve stem is raised as by the ringer. This raises both the valve 27 and the valve 23 and reduces the passages 21 and 22 to atmospheric pressure. All of the liquid in the pipe 17 below the joint where it turns downwardly will be returned to the carboy or container 10.

As the without departing from the spirit of my When assembling the valves, the valve cap and guide 26 is not in place. The valve 27 is first inserted, then the valve 23, after ywhich the cap 26 is screwed into place as shown. A' screw driver may be used to 4tighten the cap into its place.

It will thus be seen that I have provided a pump for carboys and other containers which will be positive in operationV and easily controlled in its delivery of liquid.v

lVVhileI have described in detail a preferred embodiment of my invention, I de' sire to have it understood that I do not limit myself to the exact showing and that modifications and changes may bemade invention and within the scope of the appended claims,

Having describedmy invention what I claim is:

1. A pump for liquid containers, comprising a plug member for closing the container opening, an outlet duct extending through the plug, an inletduct for the delivery of gas pressure, a'bove atmospheric the gas forcing means and the inlet duct, an

inlet check valve for the admission of gas to the gas forcing means and hand con-V trolled means for simultaneously Vopening both valves. v

t 3. A pump for liquid containers compris ing aplug member for closing the container opening, an outlet duct extending through the plug, an inlet duct for the delivery of gas pressure, above atmospheric pressure, to

the container, a means for forcing gas into the `inlet duct, an exhaust check lvalve between the gas forcing means and the inlet duct, an inlet checkvalve for the admission of gas tothe gas forcing means, the inlet check valve being adjacent and having its axis in line with the exhaust valve, the inlet valve having a stem, the end of which extends to .a position to be manually controlled. Y ,Y

t. A pump for liquid containers comprising a plug memberl for closingV 'the container opening, an` outlet duct extending through the plug, an inlet duct for theV delivery of air pressure, above atmospheric` pressure, tothe container, avrubber hand bulb for forcing air into t-he inletv duct, an exhaust check valve between the bul'b and the inletr valve, an inlet valve having its largest diameter less than the smallest diameter of the valve'seat Vof' the exhaust valve, a cap for the exhaust valve and hav-y ing means for guiding the latter to and from its seat, the inlet valve having'afpor- Vtion extending Ato a kposition for manualengagement, the valves being so arranged, relative to each other, that the raising of the' inlet valve will also raise the exhaust valve.

5. A pump for'liquid containers compris-` ing'an inlet duct for the delivery of air pressure, a bulb, inlet and exhaust valves for controlling the passage of air to and from the bulb, means for manuallyoperatin'g one of theV valves and means between the two valves to cause the opening of both valves when the manual means is operated to cause a vent for the container. 1

6. A pumpfor liquid. containers comprising an inlet duct forthe delivery of Vair pressure, la bulb,l inlet and Vexhaust valves f for controllingrthe passage of air to and from the bulb, the inlet valve Vhaving an extension :for manual control,`fthe` valvesbeing so constructed that the valves actas a vent for the container when the inlet valve is manuallyraised.k i Y In testimony whereof I 'hereunto' aiix my signature.V Y j Y WILLIAM THOMPSON, 

